I have 2 Chinese atvs 125cc for my boys and both just stopped working simultaneously. New battery's solenoid voltage good. Turn key and press button nothing not even a sound when it first started would crank but not start now nothing at all. Thinking maybe a safety switch somewhere but not sure how to checkout bypass any help would be appreciated Been many days and nights messing with these things

 

Forgot to mention the head and brake lights will not come on either...

 

Most likely fault for two bikes to stop at the same time is dirt/water in the fuel.

Have you charged the batteries up? Turning the engine over without it starting soon runs the battery down on small bikes. Also check main fuses,

 

Both batteries are new and are fully charged, if it was bad fuel I would still get a crank I get nothing not a single noise.